SIMPLE FIXTURE DETERMINES LEAKAGE OF CAPACITORS AND SEMICONDUCTOR SWITCHES
The circuit inĀ Figure 1aĀ comprises a voltage follower, IC1Ā , and the reference-voltage source of IC2. IC1Ā is anĀ Analog DevicesĀ AD8661 op amp, which has a guaranteed input-bias current of no more than 1 pA and a typical input-bias current of 0.3 pA (Reference 1), and IC2Ā is an Analog Devices ADR391 precision voltage reference (Reference 2). The manufacturer trims …
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